JP2007180867A - Wireless communication device, wireless authentication system, and wireless authentication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication device, a wireless authentication system, and a wireless authentication method which not only prevent interference with a mobile communication signal of a wireless authentication signal but also reduce battery consumption on a key side, by performing such control as to stop a wireless authentication operation of a wireless authentication part mounted on a mobile phone when transmitting/receiving mobile waves by the mobile phone. <P>SOLUTION: A wireless authentication control part 304 stops transmission of a response signal in response to a communication state signal inputted from a wireless communication control part 101, which shows that the mobile phone 100 is busy or is communicating, and restarts transmission of the response signal in response to the communication state signal which shows that the mobile phone 100 is disengaged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication device, a wireless authentication system, and a wireless authentication method, and more particularly to a wireless communication device, a wireless authentication system, and a wireless authentication method for performing wireless authentication processing between a portable communication device and a key.

  Conventionally, there is a device described in Patent Document 1 as a device use restriction system. This device use restriction system includes a first transmitter and a first receiver, and the first transmitter is attached to the target device and a wireless communication unit that transmits an identification code signal with a constant intensity. A wireless authentication unit having a second receiver and a second transmitter. When the wireless communication unit and the wireless authentication unit are separated from each other by a certain distance, the wireless authentication unit is connected to the target device. The use is restricted and the wireless communication unit notifies the alarm by sound.

In other words, in the above-mentioned device usage restriction system, if the target device such as a mobile phone leaves the owner or the user due to misplacement or theft, the target device itself is disabled and the target device is separated by a certain distance or more. This is a warning that sounds.
Japanese Patent No. 293276

  In the conventional device use restriction system, an authentication signal is always transmitted and received between a wireless communication unit (hereinafter referred to as a key) and a portable terminal device. As a radio signal output from the radio authentication unit of the radio communication unit, radio waves having a frequency of about several hundreds of MHz are currently used from the viewpoint of easy wraparound and propagation loss.

  The authentication process using the radio wave is frequently performed at intervals of about several seconds from the viewpoint of theft prevention and misplacement prevention. For this reason, there is a case where the time when the wireless authentication unit mounted in the mobile terminal device or on the key transmits a signal and the time when the mobile phone as the mobile terminal device transmits and receives a mobile communication signal may overlap. In this case, as shown in FIG. 16, the harmonics (2 * f1, 3 * f1, 4 * f1, 5 * f1, n * f1) of the signal frequency f1 transmitted from the wireless communication unit are used in the cellular phone. This causes a problem of interference.

  That is, an authentication signal and a response signal transmitted from the wireless authentication unit of the key, which is the wireless communication unit shown in FIG. 17A, to the mobile phone are constantly transmitted, and as shown in FIG. If the response signal transmitted from the authentication unit to the key and the mobile phone operation shown in FIG. 5C are performed at the same time, the authentication signal and the mobile communication signal interfere with each other inside the mobile phone. For example, when the frequency used in the wireless authentication unit is about 400 MHz, the fifth harmonic thereof interferes with the 2 GHz band usage band of the mobile phone, and when the frequency used in the wireless authentication unit is about 300 MHz, The third harmonic wave interferes with the 800 MHz band of the mobile phone.

  The present invention has been made in view of the above points, and controls mobile communication using a wireless authentication signal by controlling to stop the wireless authentication operation of a wireless authentication unit mounted on the mobile phone when transmitting and receiving mobile radio waves with the mobile phone. An object of the present invention is to provide a wireless communication apparatus, a wireless authentication system, and a wireless authentication method that prevent interference with a signal and reduce battery consumption on the key side.

  A wireless communication device of the present invention is a wireless communication device that performs communication with a communication device by first wireless communication and performs mutual authentication with a wireless communication unit by second wireless communication, First wireless communication means for performing first wireless communication, second wireless communication means for performing second wireless communication, and second wireless communication according to a communication operation state by the first wireless communication means And a wireless authentication control means for controlling the wireless communication operation of the communication means.

  According to this configuration, during the communication by the first wireless communication, the first wireless communication by the second wireless communication signal for the mutual authentication is controlled by controlling the communication operation by the second wireless communication for the mutual authentication. Interference with the signal can be prevented.

  The wireless communication apparatus according to the present invention is the wireless communication apparatus according to claim 1, wherein the wireless authentication control unit is configured to perform the mutual communication in the second wireless communication unit during the communication operation by the first wireless communication unit. A configuration for stopping the transmission operation related to authentication is adopted.

  According to this configuration, during the communication by the first wireless communication, the transmission operation related to the mutual authentication is stopped, thereby preventing the second wireless communication signal related to the mutual authentication from interfering with the first wireless communication signal. can do.

  The wireless communication apparatus according to the present invention is the wireless communication apparatus according to claim 2, wherein the wireless authentication control unit is configured to perform the mutual communication in the second wireless communication unit when the communication operation by the first wireless communication unit ends. A configuration for resuming wireless communication operation related to authentication is adopted.

  According to this configuration, it is possible to automatically restart the mutual authentication operation between the wireless communication device and the wireless communication unit when the communication operation by the first wireless communication unit ends.

  The wireless communication apparatus according to the present invention is the wireless communication apparatus according to claim 1, wherein the wireless authentication control unit is configured to perform the mutual communication in the second wireless communication unit during the communication operation by the first wireless communication unit. The transmission operation related to authentication is stopped and a control signal related to the stop of the transmission operation is transmitted to the wireless communication unit by the second wireless communication unit.

  According to this configuration, the operation of the wireless communication unit can be controlled by the control signal during the communication operation by the first wireless communication means. As a result, the wireless communication unit can be shifted to an operation that reduces power consumption.

  The wireless communication apparatus according to the present invention is the wireless communication apparatus according to claim 4, wherein the wireless authentication control unit resumes the wireless communication operation related to the mutual authentication when the communication operation by the first wireless communication unit ends. The control signal to be transmitted is transmitted to the wireless communication unit by the second wireless communication means.

  According to this configuration, it is possible to automatically restart the mutual authentication operation between the wireless communication device and the wireless communication unit when the communication operation by the first wireless communication unit ends.

  The wireless communication device according to the present invention is the wireless communication device according to claim 5, wherein the second wireless communication unit includes a variable attenuation unit that varies a signal strength of a transmission / reception signal related to the mutual authentication. The authentication control means adopts a configuration in which the setting of the attenuation rate of the variable attenuation means is changed during the wireless communication operation related to the mutual authentication and during the stop of the transmission operation related to the mutual authentication.

  According to this configuration, during the communication operation by the first wireless communication unit, the reception level of the received signal in the second wireless communication unit can be changed so as not to interfere with the communication operation.

  The radio communication apparatus according to the present invention is the radio communication apparatus according to claim 6, wherein the radio authentication control means sets the attenuation rate of the variable attenuation means to be set while the transmission operation related to the mutual authentication is stopped. A configuration is adopted in which the attenuation rate of the variable attenuation means set during the wireless communication operation related to authentication is made larger.

  According to this configuration, during the communication operation by the first wireless communication means, the reception level of the reception signal received by the second wireless communication means can be lowered, and the reception signal received by the second wireless communication means Interference with the communication operation of the first wireless communication means can be prevented.

  Further, the wireless communication device according to the present invention is the wireless communication device according to claim 1, 2 or 4, wherein the wireless authentication control means is configured such that when the transmission operation related to the mutual authentication is stopped, the first wireless communication means Use a configuration that does not limit the communication function.

  According to this configuration, even when mutual authentication between the wireless communication device and the wireless communication unit is not established, the communication operation in the first wireless communication unit can be continued, and the convenience of the wireless communication device is improved. Can do.

  The wireless communication apparatus according to the present invention employs a configuration in which the reception operation in the second wireless communication unit is stopped during the communication operation by the first wireless communication unit.

  According to this configuration, it is possible to prevent the reception signal received by the second wireless communication unit from interfering with the communication operation of the first wireless communication unit.

  The wireless communication apparatus of the present invention is the wireless communication apparatus according to any one of claims 1 to 9, wherein the wireless communication unit includes alarm means for notifying an alarm when the mutual authentication is not established, and the wireless authentication control The means adopts a configuration in which during the communication operation by the first wireless communication means, a control signal indicating that the alarm means is not operated is transmitted to the wireless communication unit by the second wireless communication means.

  According to this configuration, since the alarm operation of the wireless communication unit is stopped during the communication operation by the first wireless communication means, it is possible to prevent the user from being notified of an unnecessary alarm.

  The wireless authentication system of the present invention is a wireless authentication system that performs mutual authentication by wireless communication between a wireless communication device and a wireless communication unit, and the wireless communication device is a first device that communicates with a communication device. A first wireless communication means for performing communication by wireless communication; a second wireless communication means for performing wireless communication related to the mutual authentication with the wireless communication unit by second wireless communication; and And a wireless authentication control means for controlling the wireless communication operation of the second wireless communication means in accordance with the communication operation state of the wireless communication means.

  According to this configuration, during the communication by the first wireless communication, the first wireless communication by the second wireless communication signal for the mutual authentication is controlled by controlling the communication operation by the second wireless communication for the mutual authentication. Interference with the signal can be prevented.

  The wireless authentication method of the present invention is a wireless authentication method for performing mutual authentication by wireless communication between a wireless communication device and a wireless communication unit. A first wireless communication step for performing communication by wireless communication; and a second wireless communication step for performing wireless communication related to the mutual authentication with the wireless communication unit by second wireless communication in the wireless communication device. And a wireless authentication control step for controlling a wireless communication operation in the second wireless communication in accordance with a communication operation state by the first wireless communication in the wireless communication device.

  According to this method, during the communication by the first wireless communication, the first wireless communication by the second wireless communication signal for the mutual authentication is controlled by controlling the communication operation by the second wireless communication for the mutual authentication. Interference with the signal can be prevented.

  According to the present invention, during the communication by the first wireless communication, the first wireless communication by the second wireless communication signal for the mutual authentication is controlled by controlling the communication operation by the second wireless communication for the mutual authentication. Interference with the signal can be prevented.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram showing an overall configuration of a wireless authentication system according to a first embodiment to which the present invention is applied. In FIG. 1, a wireless authentication system 10 includes a mobile phone 100 as a wireless communication device with a wireless authentication function, a key communication unit 400 as a wireless communication unit with a wireless authentication function, and a wireless base station as a communication device. 600.

  In FIG. 1, the mobile phone 100 includes a radio communication unit 200 that executes mobile communication processing with the radio base station 600 and a radio authentication unit 300 that executes radio authentication processing with the key communication unit 400.

  In FIG. 1, a key communication unit 400 includes a wireless authentication unit 500 that performs wireless authentication processing with the mobile phone 100, an alarm circuit unit 506 and an external output unit 507 that issue an alarm when wireless authentication is not established, and a key communication unit. A battery 509 is provided to supply power to each unit in 400.

  FIG. 2 is a block diagram showing the configuration of the mobile phone 100. 2, the mobile phone 100 includes a wireless communication control unit 101, a battery 102, a timer 103, an alarm circuit unit 104, an external output unit 105, an operation input unit 106, a microphone 107, and a wireless communication unit 200. And the wireless authentication unit 300.

  The wireless communication control unit 101 controls the wireless communication unit 200 according to the operation signal input from the operation input unit 106 to control the mobile communication process with the wireless base station 600 and is input from the microphone 107. Transmission control of a transmission signal, reception control of a reception signal input from the wireless communication unit 200, and the like are executed. In addition, the wireless communication control unit 101 controls the operation of the wireless authentication unit 300 by outputting a communication state signal indicating the operation state of mobile communication to the wireless authentication unit 300, and the use restriction signal input from the wireless authentication unit 300 or The usage restriction operation or the usage restriction release operation of the mobile communication function is controlled by the usage restriction release signal.

  The battery 102 is configured by a rechargeable battery or the like, and supplies power to each unit in the mobile phone 100. The timer 103 measures the time for setting each operation timing of the portable communication control in the wireless communication control unit 101 and the wireless authentication control in the wireless authentication unit 300, and the measured time is measured by the wireless communication control unit 101 and the wireless authentication unit. 300.

  The alarm circuit unit 104 is a circuit that operates in response to an alarm output instruction signal input from the wireless authentication unit 300 when wireless authentication with the key communication unit 400 is not established. When the signal is input, the output unit of the external output unit 105 is selected. An alarm is notified to the user by an alarm sound or an alarm display.

  The external output unit 105 includes output units such as a speaker, a vibration unit, a cover unit, and the like, and notifies the user of an alarm by an output unit selected by a selection signal input from the alarm circuit unit 104. The operation input unit 106 includes a numeric keypad, various function keys, and the like, and outputs an operation signal corresponding to the key operation by the user to the wireless communication control unit 101.

  The wireless communication unit 200 includes an antenna 201, a transmission / reception switching unit 202, a transmission unit 203, and a reception unit 204.

  The antenna 201 transmits a transmission signal from the transmission unit 203 connected via the transmission / reception switching unit 202 to the radio base station 600 and receives a signal from the partner mobile phone via the radio base station 600. The received signal is given to the receiving unit 204 via the transmission / reception switching unit 202.

  The transmission / reception switching unit 202 switches and connects the transmission unit 203 and the reception unit 204 to the antenna 201. The transmission unit 203 modulates the transmission signal input from the wireless communication control unit 101 and supplies the modulated signal to the antenna 201 via the transmission / reception switching unit 202. The receiving unit 204 receives a received signal from the antenna 201 via the transmission / reception switching unit 202, demodulates the received signal, and outputs the demodulated signal to the wireless communication control unit 101.

  The wireless authentication unit 300 includes an antenna 301, a transmission / reception unit 302, an authentication ID storage unit 303, a wireless authentication control unit 304, a memory 305, a signal level detection unit 306, and a use restriction device 307. The

  The antenna 301 transmits a transmission signal related to wireless authentication input from the transmission / reception unit 302 to the key communication unit 400, receives a signal related to wireless authentication from the key communication unit 400, and outputs the signal to the transmission / reception unit 302.

  The transmission / reception unit 302 generates a transmission signal obtained by modulating a signal related to wireless authentication input from the wireless authentication control unit 304, transmits the signal from the antenna 301, demodulates a signal related to wireless authentication from the reception signal input from the antenna 301, The demodulated signal is output to wireless authentication control unit 304 and signal level detection unit 306.

  The authentication ID storage unit 303 stores an identification code signal in advance. This identification code signal includes a self-identification symbol (ID) that identifies the mobile phone 100 and an identification symbol that identifies the key communication unit 400 corresponding to the mobile phone 100.

  The wireless authentication control unit 304 controls the wireless authentication process by the wireless authentication program stored in the memory 305, and controls the operation timing of the wireless authentication process by the time measured supplied from the timer 103. When a search signal related to wireless authentication is input from the transmission / reception unit 302, the wireless authentication control unit 304 compares the search signal with the identification code signal stored in the authentication ID storage unit 303, and the search signal If it is, the response signal (confirmation code signal) indicating that the search signal has been received is transmitted from the transmission / reception unit 302 with a certain strength.

  Further, the wireless authentication control unit 304 stops the transmission of the response signal when the mobile phone 100 is in a call or in communication based on the communication state signal input from the wireless communication control unit 101, and the mobile phone 100 receives the communication state signal. When 100 is the call end or the communication end, the transmission of the response signal is resumed. Further, the wireless authentication control unit 304 continues the transmission operation of the response signal when the use restriction release signal is input from the use restriction device 307, and when the use restriction signal is input from the use restriction device 307, the wireless authentication control unit 304 If the telephone 100 is in a call or communicating, the output of the use restriction signal to the wireless communication control unit 101 is stopped. If the mobile phone 100 has finished the call or communication, the wireless communication control of the use restriction signal is performed. The output to the unit 101 is permitted.

  The memory 305 stores a wireless authentication program for controlling the wireless authentication process. When the authentication signal related to wireless authentication received by the transmission / reception unit 302 is input, the signal level detection unit 306 detects the reception level of the authentication signal (identification code signal) and outputs it to the use restriction device 307.

  The use restriction device 307 compares the reception level input from the signal level detection unit 306 with a preset threshold, and if the reception level is greater than the threshold, a use restriction release signal for releasing the use restriction is transmitted to the wireless communication control unit 101. And when the reception level is lower than the threshold, if permission is input from the wireless authentication control unit 304, a use restriction signal for restricting use is sent to the wireless communication control unit 101. Output.

  The use restriction device 307 explained the case where the use restriction signal or the use restriction release signal is output to the wireless communication control unit 101 and the wireless authentication control unit 304 according to the comparison result of the reception level. For example, the wireless communication control unit 101 and the wireless authentication control unit 304 may perform the same processing by outputting or stopping the use restriction release signal according to the reception level comparison result. Good.

  Next, the configuration of the key communication unit 400 of FIG. 1 will be described with reference to the block diagram shown in FIG.

  3, the key communication unit 400 includes a wireless authentication unit 500, an alarm circuit unit 506, an external output unit 507, a memory 508, a battery 509, and a timer 510.

  The wireless authentication unit 500 includes an antenna 501, a transmission / reception unit 502, an authentication signal level detection unit 503, a wireless authentication unit control unit 504, and an authentication ID storage unit 505.

  The antenna 501 transmits a transmission signal related to wireless authentication input from the transmission / reception unit 502 to the mobile phone 100, receives a signal related to wireless authentication from the mobile phone 100, and outputs the signal to the transmission / reception unit 502.

  The transmission / reception unit 502 generates a transmission signal obtained by modulating the signal related to wireless authentication input from the wireless authentication unit control unit 504, transmits the signal from the antenna 501, and demodulates the signal related to wireless authentication from the reception signal input from the antenna 501. The demodulated signal is output to authentication signal level detection section 503 and wireless authentication unit control section 504.

  When an authentication signal related to wireless authentication received by the transmission / reception unit 502 is input, the authentication signal level detection unit 503 detects the reception level of the authentication signal (identification code signal) and outputs it to the wireless authentication unit control unit 504. .

  The wireless authentication unit control unit 504 controls the wireless authentication process by the wireless authentication program stored in the memory 508, and controls the operation timing of the wireless authentication process by the time measured supplied from the timer 510. The wireless authentication unit control unit 504 transmits a search signal related to wireless authentication from the transmission / reception unit 502 to the mobile phone 100 with a certain strength, and when the transmission / reception unit 502 receives and inputs a response signal to the search signal, The response signal and the identification code signal stored in the authentication ID storage unit 505 are collated, and when the search signal is for itself, an authentication signal (identification code signal) generated from the identification code signal is transmitted / received by the transmission / reception unit 502. Transmit at a constant strength.

  The authentication ID storage unit 505 stores an identification code signal in advance. This identification code signal includes a self-identification symbol (ID) that identifies the key communication unit 400 and an identification symbol that identifies the mobile phone 100 corresponding to the key communication unit 400.

  The alarm circuit unit 506 is a circuit that operates in response to an alarm output instruction signal input from the wireless authentication unit 500 when wireless authentication with the mobile phone 100 is not established. When the signal is input, the output unit of the external output unit 507 is selected to generate an alarm. An alarm is notified to the user by sound or alarm display.

  The external output unit 507 includes an output unit such as a speaker, a vibration unit, a cover unit, and the like, and notifies the user of an alarm by an output unit selected by a selection signal input from the alarm circuit unit 506.

  The memory 508 stores a wireless authentication program and the like for controlling the wireless authentication process. The battery 509 is composed of a replaceable battery or the like, and supplies power to each part in the key communication unit 400. The timer 510 measures the time for setting the operation timing of the wireless authentication control in the wireless authentication unit 500 and supplies the measured time to the wireless authentication unit 500.

  Next, the configuration of transmission / reception section 302 in wireless authentication section 300 shown in FIG. 2 will be described with reference to the block diagram shown in FIG. In FIG. 4, the transmission / reception unit 302 includes a variable attenuator (variable ATT) 302a, a transmission / reception switching unit 302b, a transmission unit 302c, and a reception unit 302d.

  The variable attenuator 302a is a variable attenuator that attenuates transmission power when transmitting a transmission signal from the antenna 301 and reception power when receiving a reception signal from the antenna 301. The attenuation rate is obtained from the wireless authentication control unit 304. Set by the input control signal.

  The transmission / reception switching unit 302b switches and connects the transmission unit 302c and the reception unit 302d to the variable attenuator 302a in accordance with the switching signal input from the wireless authentication control unit 304.

  The transmission unit 302c modulates a signal related to wireless authentication input from the wireless authentication control unit 304, generates a transmission signal, and outputs the transmission signal to the transmission / reception switching unit 302b. The receiving unit 302d demodulates a signal related to wireless authentication from the received signal input from the transmission / reception switching unit 302b and outputs the signal to the wireless authentication control unit 304.

  Next, wireless authentication processing executed by the mobile phone 100 will be described with reference to the flowchart shown in FIG.

  In FIG. 5, first, the wireless authentication control unit 304 is using the communication function using the communication status signal input from the wireless communication control unit 101 and the use restriction signal or the use restriction release signal input from the use restriction device 307. It is determined whether or not (step S101). If it is determined that the use is being restricted (step S101: YES), the processing is terminated as it is. Further, when it is determined that the use is not restricted, that is, when it is determined that periodic wireless authentication is performed and established (step S101: NO), wireless communication is performed by a communication state signal input from the wireless communication control unit 101. Unit 200 determines whether or not a call or communication is being performed by wireless communication (PHS (Personal Handyphone System), PDC (Personal Digital Cellular), W-CDMA (Wideband Code Division Multiple Access), CDMA2000, wireless LAN, etc.). (Step S102).

  When the wireless authentication control unit 304 determines that a call or communication is in progress (step S102: YES), the wireless authentication control unit 304 stops the response of the authentication signal from the wireless authentication unit 300 to the key communication unit 400 (step S103). The use of the communication function for the unit 200 is not restricted (step S104), and this process is terminated.

  If the wireless authentication control unit 304 determines that a call or communication is not being performed (step S102: NO), the wireless authentication control unit 304 performs an operation based on a normal wireless authentication sequence and transmits a response signal to the key communication unit 400. (Step S105), and this process is terminated.

  In the wireless authentication process of the wireless authentication unit 300 in the mobile phone 100 described above, a signal output from the wireless authentication unit 300 is, for example, as shown in FIG. 6, (a) shows the operation of the wireless authentication unit 500 of the key communication unit 400, (b) shows the operation of the wireless authentication unit 300 of the mobile phone 100, and (c) shows the operation of the wireless communication unit 200 of the mobile phone 100. It is a timing chart which shows. 2A and 2B show a transmission operation (Tx) and a reception operation (Rx) of the challenge and response authentication method.

  In FIG. 6C, when the mobile phone 100 starts a telephone operation and is notified to the wireless authentication unit 300 by the communication state signal (timing T1 in the figure), the wireless authentication unit 300 of the mobile phone 100 responds. Stop sending authentication signals. At this time, since the key communication unit 400 cannot receive a response to the transmitted authentication signal, the key communication unit 400 shifts to the search mode and starts transmitting the search signal.

  In FIG. 8C, when the wireless authentication unit 300 is notified by the communication state signal that the telephone operation of the mobile phone 100 is completed (timing T2 in the figure), the wireless authentication unit 300 of the mobile phone 100 is notified. When the operation is resumed and a search signal is received, a response signal is transmitted, and thereafter, the authentication mode is entered and the wireless authentication operation using the authentication signal and the response signal is resumed.

  In the wireless authentication operation shown in FIG. 6 described above, the key communication unit 400 only continues the operation based on the challenge and response authentication method, so the wireless authentication program of the key communication unit 400 needs to be changed. The cost of changing the specifications of the wireless authentication system can be suppressed.

  Further, the signal output from the wireless authentication unit 300 may be, for example, as shown in FIG. 7, (a) shows the operation of the wireless authentication unit 500 of the key communication unit 400, (b) shows the operation of the wireless authentication unit 300 of the mobile phone 100, and (c) shows the operation of the wireless communication unit 200 of the mobile phone 100. It is a timing chart which shows.

  In FIG. 7C, when the mobile phone 100 starts a telephone operation and is notified to the wireless authentication unit 300 by the communication state signal (timing T1 in the figure), the wireless authentication unit 300 of the mobile phone 100 responds. Transmission of the authentication signal is stopped, and a control signal added with information to stop transmission of the response is transmitted to the key communication unit 400 (timing t1 in the figure). At this time, when the key communication unit 400 receives the control signal for the transmitted authentication signal, the key communication unit 400 recognizes that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped, and continues the authentication operation as it is. . At this time, since the cellular phone is not stolen or misplaced, in the key communication unit 400, it is desirable not to notify the user of an alarm by an alarm sound, an alarm display, or the like by the output means of the external output unit 507. The control signal may include a control signal notifying the user of an alarm.

  In FIG. 8C, when the telephone operation of the mobile phone 100 is finished and the wireless authentication unit 300 is notified by the communication state signal (timing T2 in the figure), the wireless authentication unit 300 of the mobile phone 100 The operation is resumed, and a control signal added with information to resume the authentication operation is transmitted to the key communication unit 400 (timing t2 in the figure). At this time, when receiving a control signal for the transmitted authentication signal, the key communication unit 400 recognizes that the authentication operation is resumed and continues the authentication operation.

  In the wireless authentication operation shown in FIG. 7, since the key communication unit 400 continues the authentication operation, the operation interval can be made longer than that in the case of shifting to the search mode shown in FIG. The battery power consumption at 400 can be reduced.

  Next, an operation sequence in the case of transmitting a control signal from the mobile phone 100 shown in FIG. 6 to the key communication unit 400 will be described with reference to FIG. Each operation of the key communication unit 400 and the mobile phone 1 shown in FIGS. 6A and 6B is a simple representation of two rounds of challenge and response. The operations shown in FIG. Are basically the same.

  In FIG. 8, between the key communication unit 400 and the mobile phone 100, two round-trip authentication processing is executed in a T-second cycle, and authentication signals 1, 3: transmission of challenge request and response transmission are transmitted within this T-second cycle. (Steps K1 and K2) and authentication signals 2 and 4, which are the response operations, are sent as authentication challenges and response responses (Steps M1 and M2). In the figure, the same processing is executed as steps K3 and K4 and steps M3 and M4.

  Then, the mobile phone 100 receives the incoming call notification from the radio base station 600 (step B1), and stops the transmission of the authentication signal in response to the reception of the authentication signal N as described above when the call or communication is performed. Since the key communication unit 400 does not receive a response to the authentication signal N, the key communication unit 400 shifts to the search mode and repeatedly executes a search signal transmission at a period of t seconds shorter than the operation interval of the authentication mode (steps K6 to K13). In response to these search signals, since the mobile phone 100 is in a call or communicating, it does not transmit a response signal. The number of search operations on the key communication unit 400 side shown in FIG. 8 simply shows the operation of FIG.

  Then, when the call or communication is completed in the mobile phone 100 (step B2), the wireless authentication unit 300 transmits a response signal to the received search signal (step M5). When the key communication unit 400 receives the response signal, the key communication unit 400 shifts to the authentication mode, and repeatedly executes authentication processing steps K14 to K17 and steps M6 to M9 with a period of T seconds as described above.

  As described above, the operation corresponding to the timing chart shown in FIG. 6 is executed between the key communication unit 400 and the mobile phone 100.

  Next, an operation sequence in the case of transmitting a control signal from the mobile phone 100 shown in FIG. 7 to the key communication unit 400 will be described with reference to FIG. In FIG. 9, the same operations as those in the operation sequence shown in FIG. In this sequence, the mobile phone 100 and the key communication unit 400 operate while maintaining synchronization. Further, each operation of the key communication unit 400 and the mobile phone 100 shown in FIGS. 7A and 7B is a simple representation of two rounds of challenge and response. The operations shown in FIG. Are basically the same.

  In FIG. 9, between the key communication unit 400 and the cellular phone 100, recognition processing for two round trips is executed in a cycle of T seconds, and authentication signals 1, 3: transmission of challenge request and response transmission are transmitted within the cycle of T seconds. (Steps K1 and K2) and in response to the reception of the authentication signals 2 and 4 as response operations, authentication signals 2 and 4 as response signals: an authentication challenge and a response response are transmitted (Steps M1 and M2). In the figure, the same processing is executed as steps K3 and K4 and steps M3 and M4.

  Then, the mobile phone 100 receives the incoming call notification from the radio base station 600 (step B1), and when it shifts to a call or communication, the authentication signal M: the authentication signal for the reception of the challenge request (step K11) as described above. The transmission is stopped, and the control signal 1 + authentication signal M + 1 added with information indicating that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped as described above is transmitted to the key communication unit 400 (step M11). Here, the cellular phone 100 and the key communication unit 400 maintain the synchronization of the authentication operation. When the key communication unit 400 receives the control signal 1 + authentication signal M + 1, the key communication unit 400 recognizes that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped, and continues the authentication mode. The authentication signal M + 2: A challenge request is transmitted (step K12). In response to this authentication signal M + 2: challenge request, the mobile phone 100 does not transmit an authentication signal.

  When the call or communication is completed in the mobile phone 100 (step B2), the authentication signal M + 3 transmitted from the key communication unit 400 T seconds after the step K12: After receiving the challenge request (step K13), the authentication operation is resumed. The control signal 2 + authentication signal M + 4 to which the information indicating that it is to be added is transmitted to the key communication unit 400 (step M12). When key communication unit 400 receives control signal 2 + authentication signal M + 4, key communication unit 400 transmits authentication signal M + 5: response transmission to mobile phone 100 (step K14). In response to this authentication signal M + 5: response transmission, the mobile phone 100 transmits an authentication signal M + 6: response response (step M13).

  As described above, the operation corresponding to the timing chart shown in FIG. 7 is executed between the key communication unit 400 and the mobile phone 100. In addition, as a control signal shown in FIG. 9, you may make it transmit a control signal separately from a normal authentication signal. In addition, when adding control signal information to a normal authentication signal, the control signal may be set to any number of bits at the beginning or end of the authentication signal, or may be set to an arbitrary bit, and the additional bits are limited. It is not a thing.

  As described above, according to the wireless authentication system of the first embodiment, when the mobile phone is talking or communicating, the response signal from the mobile phone is stopped. It is possible to prevent radio waves from interfering.

  Further, according to the wireless authentication system of the first embodiment, the key communication unit continues the operation based on the challenge-and-response authentication method by stopping transmission of the response signal by the mobile phone. The wireless authentication program or the like need not be changed, and the specification change cost of the wireless authentication system can be suppressed.

  Furthermore, according to the wireless authentication system of the first embodiment, the key communication unit continues the authentication mode operation by transmitting the control signal to the key communication unit when the transmission of the response signal by the mobile phone is stopped. The operation interval can be made longer than when shifting to the search mode, and the battery power consumption in the key communication unit can be reduced.

  In the first embodiment, the case where a mobile phone is applied as a wireless communication device has been described. However, the present invention is not limited to this device. For example, a portable information terminal such as a PDA (Personal Digital Assistance), a personal computer, You may make it apply to portable apparatuses, such as the apparatus with which the computer function was united, and also MP3 player and HDD player. In addition, although an example of a wireless base station for mobile communication has been described as a communication device, the present invention is not limited to this device, and may be a wireless LAN access point, for example.

  In the first embodiment, the following method may be used on the mobile phone side in order to reduce the influence of the signal from the key communication unit during a call or communication.

  The attenuation rate of the variable attenuator 302a provided in the transmission / reception unit 302 in the wireless authentication unit 300 on the mobile phone 100 side is set to a larger value (for example, infinity) than that during authentication communication, and the authentication signal from the key communication unit 400 is transmitted by the antenna 301. Even if it is received, the signal level received by the receiving unit 302d is lowered. Further, even if the reception unit 302d in the transmission / reception unit 302 in the wireless authentication unit 300 on the mobile phone 100 side is turned off during a call or communication and the authentication signal from the key communication unit 400 is received by the antenna 301, the signal is received by the reception unit 302d. Do not accept. A switch may be used instead of the variable attenuator 302a. These methods may be combined according to the communication state of the mobile phone.

  In the first embodiment, FIG. 7 shows the case where the mobile phone 100 stops the transmission / reception operation related to the wireless authentication while the telephone call or communication is in progress, but it waits for a signal transmitted from the key communication unit 400. Only the operation may be executed. In this case, even if the control signal transmitted from the mobile phone 100 cannot be received on the key communication unit 400 side, the search signal transmitted from the key communication unit 400 can be received, and the process immediately shifts to the authentication operation. Is possible.

(Embodiment 2)
In the second embodiment, not only the wireless authentication unit on the mobile phone side that is the wireless communication device, but also the wireless authentication unit on the key communication unit side that is the wireless communication unit performs the transmission / reception operation using the wireless communication unit on the mobile phone side. Perform the appropriate control. Specifically, a control example in the case of intermittent transmission / reception operation in response to the stop of transmission of the authentication signal on the mobile phone side in order to extend the battery life built in the key side will be described.

  The wireless authentication system according to the second embodiment applies the same configuration as that of the wireless authentication system 10 shown in the first embodiment. Therefore, the system configuration and the configurations of the mobile phone 100 and the key communication unit 400 are the same. Illustration and configuration explanation are omitted.

  A wireless authentication operation executed in mobile phone 100 and key communication unit 400 in the second embodiment will be described with reference to the flowchart shown in FIG. FIG. 10A is a flowchart showing the wireless authentication operation of the mobile phone 100, and FIG. 10B is a flowchart showing the wireless authentication operation of the key communication unit 400.

  In FIG. 10A, the wireless authentication control unit 304 of the mobile phone 100 determines whether or not the use of the communication function is restricted based on the communication state signal input from the wireless communication control unit 101 (step S201). If it is determined that the use is being restricted (step S201: YES), the process is terminated as it is. When it is determined that the use is not restricted (step S201: NO), the wireless communication unit 200 is connected to the wireless communication (PHS (Personal Handyphone System), PDC (Personal Digital Cellular) by the communication state signal input from the wireless communication control unit 101. ), W-CDMA (Wideband Code Division Multiple Access), CDMA2000, wireless LAN, or the like) is determined (step S202).

  At this time, it is assumed that the key communication unit 400 in FIG. 5B is performing a normal authentication operation as the operation state 1 (step S301).

  If the wireless authentication control unit 304 determines that a call or communication is not being performed (step S202: NO), the wireless authentication control unit 304 performs a process of transmitting an authentication signal as a response from the wireless authentication unit 300 to the authentication signal received from the key communication unit 400. This is executed (step S203), and this process is terminated. When the wireless authentication control unit 304 determines that a call or communication is in progress (step S202: YES), a control signal to which information indicating that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped is added. Is transmitted from the wireless authentication unit 300 (step S204).

  In step S204, it is necessary to transmit a control signal when the key communication unit 400 is in a standby state based on the time measured by the timer 103.

  Thereafter, the wireless authentication control unit 304 stops the response from the wireless authentication unit 300 to the key communication unit 400 (step S205), and does not limit the function of the mobile communication function for the wireless communication unit 200 (step S206).

  When the wireless authentication unit control unit 504 of the key communication unit 400 receives the control signal, the wireless authentication unit control unit 504 recognizes that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped, and shifts to the operation state 2 as follows. Various operations are executed (step S302). In the operation state 2, the key communication unit 400 performs an authentication operation mode maintenance process, an alarm operation stop process, an authentication mode authentication signal transmission period change process, an authentication signal transmission stop process, and the like. Further, these processes may be executed in combination.

  Next, the wireless authentication control unit 304 of the mobile phone 100 determines whether or not a call or communication is in progress based on the communication state signal input from the wireless communication control unit 101 (step S207), and determines that the call or communication is in progress. In the case (step S207: YES), the process returns to step S205. That is, when the wireless communication unit 200 is talking or communicating, the wireless authentication control unit 300 repeatedly executes the processing from step S205 to step S207.

  If the wireless authentication control unit 304 determines that a call or communication is not being performed (step S207: NO), the wireless authentication control unit 304 transmits a control signal with information indicating that the authentication operation is resumed to the key communication unit 400 (step S207). S208), the process is terminated.

  When receiving the control signal, the wireless authentication unit control unit 504 of the key communication unit 400 recognizes that the authentication operation is resumed, returns to the operation state 1 (step S303), and ends this process. Here, the key communication unit 400 may shift to another operation state 3 or the like instead of returning to the operation state 1.

  In the wireless authentication process of the wireless authentication unit 300 in the mobile phone 100 described above, the signal output from the wireless authentication unit 300 and the intermittent operation in the key communication unit 400 are as shown in FIG. 11, for example. 11, (a) shows the operation of the wireless authentication unit 500 of the key communication unit 400, (b) shows the operation of the wireless authentication unit 300 of the mobile phone 100, and (c) shows the operation of the wireless communication unit 200 of the mobile phone 100. It is a timing chart which shows. 2A and 2B show a transmission operation (Tx) and a reception operation (Rx) of the challenge and response authentication method.

  In FIG. 11C, when the mobile phone 100 starts a telephone operation and is notified to the wireless authentication unit 300 by the communication state signal (timing T1 in the figure), the mobile phone 100 shown in FIG. The wireless authentication unit 300 transmits a control signal to which information indicating that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped is added. In FIG. 5A, when the wireless authentication unit 500 of the key communication unit 400 receives the control signal, it recognizes that the response from the wireless authentication unit 300 to the key communication unit 400 is stopped, and shifts to the intermittent reception operation. To do. At this time, since the cellular phone is not stolen or misplaced, in the key communication unit 400, it is desirable not to notify the user of an alarm by an alarm sound, an alarm display, or the like by the output means of the external output unit 507. The control signal may include a control signal notifying the user of an alarm.

  Then, when the telephone operation of the mobile phone 100 is completed and the wireless authentication unit 300 is notified by the communication state signal (timing T2 in the figure) in FIG. 5C, the mobile phone in FIG. The wireless authentication unit 300 of 100 transmits a control signal to which information indicating that the operation is resumed is added. In FIG. 9A, when receiving the control signal, the wireless authentication unit 500 of the key communication unit 400 recognizes that the authentication operation is resumed, and resumes the normal authentication signal transmission / reception operation from the intermittent reception operation. .

  In the wireless authentication operation shown in FIG. 11 above, when the response operation on the mobile phone 100 side is stopped, the key communication unit 400 does not transmit a search signal but only performs an intermittent reception operation. Battery consumption can be further reduced.

  Next, an operation sequence in the case of transmitting a control signal from the mobile phone 100 shown in FIG. 11 to the key communication unit 400 will be described with reference to FIG. In this sequence, the mobile phone 100 and the key communication unit 400 operate while maintaining synchronization. In FIG. 12, the same reference numerals are assigned to the same operations as those in the operation sequence shown in FIG. Further, each operation of the key communication unit 400 and the mobile phone 1 shown in FIGS. 11A and 11B is a simple representation of two rounds of challenge and response. The operations shown in FIG. Are basically the same.

  In FIG. 12, between the key communication unit 400 and the mobile phone 100, two round-trip authentication processes are executed in a T-second cycle, and within this T-second cycle, authentication signals 1 and 3: a challenge request and a response transmission are transmitted. (Steps K1 and K2), and authentication signals 2 and 4: which are the response operations: an authentication challenge and a response response are transmitted (Steps M1 and M2). In the figure, the same processing is executed as steps K3 and K4 and steps M3 and 4.

  Then, when receiving the incoming call notification from the radio base station 600 (step B1), the mobile phone 100 stops the transmission of the authentication signal in response to the reception of the authentication signal M: challenge request (step K21) as described above, and the radio authentication unit The control signal 1 + authentication signal M + 1 to which information indicating that the response from 300 to the key communication unit 400 is stopped is added (step M21). Here, the cellular phone 100 and the key communication unit 400 maintain the synchronization of the authentication operation. In the figure, the control signal is added to the normal authentication signal and the control signal information is added to transmit the control signal 1 + authentication signal M + 1. However, the control signal is transmitted separately from the normal authentication signal. Also good. In addition, when adding control signal information to a normal authentication signal, the control signal may be set to any number of bits at the beginning or end of the authentication signal, or may be set to an arbitrary bit, and the additional bits are limited. It is not a thing.

  When receiving the control signal control signal 1 + authentication signal M + 1, the key communication unit 400 executes only the intermittent reception operation as shown in FIG. 11 (a). The interval of this intermittent reception operation is set to a T second period as shown in the figure. This operation interval is not particularly limited.

  Then, when the call or communication is completed in the mobile phone 100 (step B2), a control signal 2 + authentication signal M + 2 to which information for resuming the authentication operation is added is transmitted to the key communication unit 400 (step M22). In the figure, the control signal is added to the normal authentication signal and the control signal information is added to transmit the control signal 2 + authentication signal M + 2. However, the control signal is transmitted separately from the normal authentication signal. Also good. The bit to be added is arbitrary as described above. Thereafter, a normal two-way reciprocating authentication operation is executed in T cycles between the key communication unit 400 and the mobile phone 100 (steps K22, K23, M23, M24).

  As described above, according to the wireless authentication system of the second embodiment, when the mobile phone is talking or communicating, transmission of a response signal from the mobile phone is stopped. It is possible to prevent radio waves from interfering.

  Further, according to the wireless authentication system of the second embodiment, the key communication unit shifts to the intermittent reception operation by transmitting the control signal to the key communication unit when the transmission of the response signal by the mobile phone is stopped. The operation interval can be made longer, and the power consumption of the battery in the key communication unit can be further reduced as compared with the case of the first embodiment.

  In the second embodiment, the case where a mobile phone is applied as a wireless communication device has been described. However, the present invention is not limited to this device. For example, a portable information terminal such as a PDA (Personal Digital Assistance), a personal computer, You may make it apply to portable apparatuses, such as the apparatus with which the computer function was united, and also MP3 player and HDD player. Further, although an example of a mobile communication wireless base station has been described as a communication device, the present invention is not limited to this device, and may be a wireless LAN access point, for example. In the second embodiment, the case where the mobile phone 100 stops the transmission / reception operation related to the wireless authentication while the mobile phone 100 is talking or communicating is shown in FIG. 11, but it waits for a signal transmitted from the key communication unit 400. Only the operation may be executed. In this case, even if the control signal transmitted from the mobile phone 100 cannot be received on the key communication unit 400 side, the search signal transmitted from the key communication unit 400 can be received, and the process immediately shifts to the authentication operation. Is possible.

(Embodiment 3)
In the third embodiment, a case will be described in which a filter is provided to suppress interference of a wireless authentication signal with a wireless communication unit inside a mobile phone.

  In each of the first and second embodiments, the case has been described in which the mobile phone stops transmission from the wireless authentication unit in order to avoid interference with the mobile radio wave during a call or communication. As another method for avoiding the interference, for example, a configuration in which a filter is provided inside the mobile phone so that a wireless authentication signal output from the wireless authentication unit does not interfere with the wireless communication control unit is also conceivable. A configuration of a cellular phone provided with this filter will be described with reference to a block diagram shown in FIG. In FIG. 13, the same components as those of the mobile phone 100 shown in FIG.

  In FIG. 13, a cellular phone 700 is provided with a filter 108 between wires to which the wireless authentication unit 300 and the wireless communication control unit 101, the timer 103, and the alarm circuit unit 104 are connected, and transmission / reception within the wireless authentication unit 300 is performed. A filter 308 is provided between wirings where the unit 302 and the antenna 301 are connected. Examples of characteristics of the filters 108 and 308 are shown in FIGS. As shown in these characteristic diagrams, filters 108 and 308 have a characteristic of attenuating harmonic components generated by the wireless authentication signal.

  Therefore, by providing the filters 108 and 308, the harmonics of the wireless authentication signal for the wireless communication control unit 101, the timer 103, and the alarm circuit unit 104 connected to the wireless authentication unit 300 inside the mobile phone 700 suppress interference caused by components. It becomes possible to do. In addition to providing the filters 108 and 308, the authentication signal transmission level from the wireless authentication unit 300 may be lowered only during a call or communication.

  As a result, by adding the filter of the third embodiment in addition to the control operations of the first and second embodiments, it is possible to effectively prevent the harmonic component generated from the wireless authentication signal from interfering with the mobile communication operation. It becomes possible to suppress.

  The use restriction device 307 is mounted on the mobile phone 100 other than the communication function restriction described in the first embodiment, for example, game operation, telephone book operation, mail operation, memo pad operation, camera operation, and the like. Application functions other than the telephone function may be restricted. However, the use restriction device 307 controls the wireless communication unit 200 according to the first and second embodiments, and restricts control over application functions in the first and second embodiments. It is not a thing. In the first and second embodiments, the case where the response from the mobile phone as the wireless communication device to the key communication unit is stopped during a call or communication has been described. The control signal or the authentication signal including the control signal or the control signal may be transmitted intermittently.

  The present invention controls the wireless authentication operation of the wireless authentication unit mounted on the mobile phone to stop when the mobile phone transmits / receives mobile radio waves to prevent interference with the mobile communication signal due to the wireless authentication signal, and This is useful for wireless authentication systems and the like in that the battery consumption on the side can be reduced.

The figure which shows the whole structure of the radio | wireless authentication system which concerns on Embodiment 1 of this invention. FIG. 2 is a block diagram showing a configuration of a mobile phone according to the first embodiment. The block diagram which shows the structure of the key communication unit which concerns on this Embodiment 1. FIG. FIG. 2 is a block diagram showing a configuration of a transmission / reception unit in a wireless authentication unit in the mobile phone according to the first embodiment The flowchart which shows the radio | wireless authentication process performed in the mobile telephone which concerns on this Embodiment 1. (A) concerning this Embodiment 1 is a timing chart which shows operation | movement of the radio | wireless authentication part of a key communication unit, (b) is a timing chart which shows operation | movement of the radio | wireless authentication part of a mobile telephone, (c) is radio | wireless of a mobile telephone. Timing chart showing operation of communication unit (A) concerning this Embodiment 1 is a timing chart which shows operation | movement of the radio | wireless authentication part of a key communication unit, (b) is a timing chart which shows operation | movement of the radio | wireless authentication part of a mobile telephone, (c) is radio | wireless of a mobile telephone. Timing chart showing operation of communication unit FIG. 6 is a sequence diagram showing an operation corresponding to FIG. 6 of the wireless authentication system according to the first embodiment. FIG. 7 is a sequence diagram showing an operation corresponding to FIG. 7 of the wireless authentication system according to the first embodiment. (A) according to Embodiment 2 of the present invention is a flowchart showing a wireless authentication operation of a mobile phone, and (b) is a flowchart showing a wireless authentication operation of a key communication unit. (A) concerning this Embodiment 2 is a timing chart which shows operation | movement of the radio | wireless authentication part of a key communication unit, (b) is a timing chart which shows operation | movement of the radio | wireless authentication part of a mobile telephone, (c) is radio | wireless of a mobile telephone. Timing chart showing operation of communication unit FIG. 11 is a sequence diagram showing an operation corresponding to FIG. 11 of the wireless authentication system according to the second embodiment. FIG. 3 is a block diagram showing a configuration of a mobile phone according to Embodiment 3 of the present invention. The figure which shows the characteristic example of the filter which concerns on this Embodiment 3. The figure which shows the other characteristic example of the filter which concerns on this Embodiment 3. The figure which shows an example of the harmonic component of the conventional radio | wireless authentication signal Conventional (a) is a timing chart showing the operation of the authentication signal in the key, (b) is a timing chart showing the operation of the authentication signal in the mobile terminal device, and (c) is a timing chart showing the operation of the mobile phone.

Explanation of symbols

10 wireless authentication system 100, 700 mobile phone 101 wireless communication control unit 102, 509 battery 103, 510 timer 104, 506 alarm circuit unit 105, 507 external output unit 106 operation input unit 107 microphone 108, 308 filter 200 wireless communication unit 201, 301, 501 Antenna 202, 302b Transmission / reception switching unit 203, 302c Transmission unit 204, 302d Reception unit 300, 500 Wireless authentication unit 302, 502 Transmission / reception unit 302a Variable attenuator 303, 505 Authentication ID storage unit 304 Wireless authentication control unit 305, 508 Memory 306 Signal level detection unit 307 Usage restriction device 400 Key communication unit 503 Authentication signal level detection unit 504 Wireless authentication unit control unit 600 Wireless base station

Claims (12)

A wireless communication device that performs communication with a communication device by first wireless communication and performs mutual authentication with a wireless communication unit by second wireless communication,
First wireless communication means for performing the first wireless communication;
Second wireless communication means for performing the second wireless communication;
A wireless communication apparatus comprising: a wireless authentication control unit that controls a wireless communication operation of the second wireless communication unit in accordance with a communication operation state of the first wireless communication unit.   2. The wireless communication according to claim 1, wherein the wireless authentication control unit stops a transmission operation related to the mutual authentication in the second wireless communication unit during a communication operation by the first wireless communication unit. apparatus.   The wireless authentication control means restarts the wireless communication operation related to the mutual authentication in the second wireless communication means when the communication operation by the first wireless communication means ends. Communication device.   The wireless authentication control means stops a transmission operation related to the mutual authentication in the second wireless communication means during a communication operation by the first wireless communication means, and sends a control signal related to the stop of the transmission operation. The wireless communication apparatus according to claim 1, wherein the second wireless communication unit transmits the wireless communication unit to the wireless communication unit.   The wireless authentication control means transmits a control signal for resuming the wireless communication operation related to the mutual authentication to the wireless communication unit by the second wireless communication means when the communication operation by the first wireless communication means ends. The wireless communication apparatus according to claim 4. The second wireless communication unit includes a variable attenuation unit that varies a signal strength of a transmission / reception signal related to the mutual authentication,
6. The wireless authentication control means changes the setting of the attenuation rate of the variable attenuation means between a wireless communication operation related to the mutual authentication and a stop of a transmission operation related to the mutual authentication. The wireless communication device described.   The wireless authentication control means makes the attenuation rate of the variable attenuation means set while the transmission operation related to the mutual authentication is stopped larger than the attenuation rate of the variable attenuation means set during the wireless communication operation related to the mutual authentication. The wireless communication apparatus according to claim 6.   5. The wireless communication apparatus according to claim 1, wherein the wireless authentication control unit does not limit a communication function of the first wireless communication unit while the transmission operation related to the mutual authentication is stopped.   The wireless communication apparatus according to claim 1, wherein the wireless authentication control unit stops the reception operation in the second wireless communication unit during the communication operation by the first wireless communication unit. The wireless communication unit includes alarm means for notifying the alarm when the mutual authentication is not established,
The wireless authentication control means transmits a control signal for not operating the alarm means to the wireless communication unit by the second wireless communication means during the communication operation by the first wireless communication means. The wireless communication device according to claim 1. A wireless authentication system that performs mutual authentication by wireless communication between a wireless communication device and a wireless communication unit,
The wireless communication device
First wireless communication means for communicating with the communication device by first wireless communication;
Second wireless communication means for performing wireless communication related to the mutual authentication with the wireless communication unit by second wireless communication;
A wireless authentication system, comprising: a wireless authentication control unit that controls a wireless communication operation of the second wireless communication unit in accordance with a communication operation state of the first wireless communication unit. A wireless authentication method for performing mutual authentication by wireless communication between a wireless communication device and a wireless communication unit,
In the wireless communication device, a first wireless communication step of performing communication with the communication device by first wireless communication;
In the wireless communication device, a second wireless communication step of performing wireless communication related to the mutual authentication with the wireless communication unit by second wireless communication;
A wireless authentication method comprising: a wireless authentication control step for controlling a wireless communication operation in the second wireless communication in accordance with a communication operation state in the first wireless communication in the wireless communication device.

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